phpMyAdmin on MySQL 8.0

问题

I have installed the MySQL 8.0 server and phpMyAdmin, but when I try to access it from the browser the following errors occur:

#2054 - The server requested authentication method unknown to the client
mysqli_real_connect(): The server requested authentication method unknown to the client [caching_sha2_password]
mysqli_real_connect(): (HY000/2054): The server requested authentication method unknown to the client

I imagine it must have something to do with the strong passwords implemented and the relative freshness of the MySQL release.

But I know nothing of the most advanced driver and connection configuration.

Has someone faced the same problem and solved it? :D

Edit
installed with apt

apt-get install mysql-server phpmyadmin

回答1:

Log in to MySQL console with root user:

root@9532f0da1a2a:/# mysql -u root -pPASSWORD

and change the Authentication Plugin with the password there:

mysql> ALTER USER root IDENTIFIED WITH mysql_native_password BY 'PASSWORD';
Query OK, 0 rows affected (0.08 sec)

You can read more info about the Preferred Authentication Plugin on the MySQL 8.0 Reference Manual

https://dev.mysql.com/doc/refman/8.0/en/upgrading-from-previous-series.html#upgrade-caching-sha2-password

It is working perfectly in a dockerized environment:

docker run --name mysql -e MYSQL_ROOT_PASSWORD=PASSWORD -p 3306:3306 -d mysql:latest

docker exec -it mysql bash

mysql -u root -pPASSWORD

ALTER USER root IDENTIFIED WITH mysql_native_password BY 'PASSWORD';

exit

exit

docker run --name phpmyadmin -d --link mysql:db -p 8080:80 phpmyadmin/phpmyadmin:latest

So you can now log in to phpMyAdmin on http://localhost:8080 with root / PASSWORD

---

mysql/mysql-server

If you are using mysql/mysql-server docker image

But remember, it is just a 'quick and dirty' solution in the development environment. It is not wise to change the MySQL Preferred Authentication Plugin.

docker run --name mysql -e MYSQL_ROOT_PASSWORD=PASSWORD -e MYSQL_ROOT_HOST=% -p 3306:3306 -d mysql/mysql-server:latest
docker exec -it mysql mysql -u root -pPASSWORD -e "ALTER USER root IDENTIFIED WITH mysql_native_password BY 'PASSWORD';"
docker run --name phpmyadmin -d --link mysql:db -p 8080:80 phpmyadmin/phpmyadmin:latest

Updated solution at 10/04/2018

Change the MySQL default authentication plugin by uncommenting the default_authentication_plugin=mysql_native_password setting in /etc/my.cnf

use at your own risk

docker run --name mysql -e MYSQL_ROOT_PASSWORD=PASSWORD -e MYSQL_ROOT_HOST=% -p 3306:3306 -d mysql/mysql-server:latest
docker exec -it mysql sed -i -e 's/# default-authentication-plugin=mysql_native_password/default-authentication-plugin=mysql_native_password/g' /etc/my.cnf
docker stop mysql; docker start mysql
docker run --name phpmyadmin -d --link mysql:db -p 8080:80 phpmyadmin/phpmyadmin:latest

Updated workaround at 01/30/2019

docker run --name mysql -e MYSQL_ROOT_PASSWORD=PASSWORD -e MYSQL_ROOT_HOST=% -p 3306:3306 -d mysql/mysql-server:latest
docker exec -it mysql sed -i -e 's/# default-authentication-plugin=mysql_native_password/default-authentication-plugin=mysql_native_password/g' /etc/my.cnf
docker exec -it mysql mysql -u root -pPASSWORD -e "ALTER USER root IDENTIFIED WITH mysql_native_password BY 'PASSWORD';"
docker stop mysql; docker start mysql
docker run --name phpmyadmin -d --link mysql:db -p 8080:80 phpmyadmin/phpmyadmin:latest

default_authentication_plugin

回答2:

New MySQL 8.0.11 is using caching_sha2_password as default authentication method. I think that phpMyAdmin cannot understand this authentication method. You need to create user with one of the older authentication method, e.g. CREATE USER xyz@localhost IDENTIFIED WITH mysql_native_password BY 'passw0rd'.

More here https://dev.mysql.com/doc/refman/8.0/en/create-user.html and here https://dev.mysql.com/doc/refman/8.0/en/authentication-plugins.html

回答3:

Another idea: as long as the phpmyadmin and other php tools don't work with it, just add this line to your file /etc/mysql/my.cnf

default_authentication_plugin = mysql_native_password

See also: Mysql Ref

I know that this is a security issue, but what to do if the tools don't work with caching_sha2_password?

回答4:

I solved this issue by doing the following:

1. Add default_authentication_plugin = mysql_native_password to the
   [mysqld] section of my.cnf
2. Enter mysql and create a new user by doing something like CREATE USER 'root'@'localhost' IDENTIFIED BY 'password';
3. Grant privileges as necessary. E.g. GRANT ALL PRIVILEGES ON * . * TO 'root'@'localhost'; and then FLUSH PRIVILEGES;
4. Login into phpmyadmin with new user

回答5:

I went to system

preferences -> mysql -> initialize database -> use legacy password encryption(instead of strong) -> entered same password

as my config.inc.php file, restarted the apache server and it worked. I was still suspicious about it so I stopped the apache and mysql server and started them again and now it's working.

回答6:

To fix this issue I just run one query in my mysql console.

For this login to mysql console using this

mysql -u {username} -p{password}

After this I just run one query as given below:-

ALTER user '{USERNAME}'@'localhost' identified with mysql_native_password by '{PASSWORD}';

when I run this query I got message that query executed. Then login to PHPMYADMIN with username/password.

回答7:

I solved my problem basically with András answer:

1- Log in to MySQL console with root user:

root@9532f0da1a2a:/# mysql -u root -pPASSWORD

And type the root's password to auth.

2- I created a new user:

mysql> CREATE USER 'user'@'hostname' IDENTIFIED BY 'password';

3- Grant all privileges to the new user:

mysql> GRANT ALL PRIVILEGES ON *.* To 'user'@'hostname';

4- Change the Authentication Plugin with the password:

mysql> ALTER USER user IDENTIFIED WITH mysql_native_password BY 'PASSWORD';

Now, phpmyadmin works fine logging the new user.

回答8:

I had this problem, did not find any ini file in Windows, but the solution that worked for me was very simple.
1. Open the mysql installer.
2. Reconfigure mysql server, it is the first link.
3. Go to authentication method.
4. Choose 'Legacy authentication'.
5. Give your password(next field).
6. Apply changes.

That's it, hope my solution works fine for you as well!

回答9:

I solved this issue by doing following:

1. Enter to system preferences -> mysql

2. Select "Initialize database" and enter a new root password selecting "Use Legacy Password Encryption".

3. Login into phpmyadmin with the new password.

回答10:

 mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'rootpassword';

Login through the command line, it will work after that.

回答11:

As @kgr mentioned, MySQL 8.0.11 made some changes to the authentication method.

I've opened a phpMyAdmin bug report about this: https://github.com/phpmyadmin/phpmyadmin/issues/14220.

MySQL 8.0.4-rc was working fine for me, and I kind of think it's ridiculous for MySQL to make such a change in a patch level release.

回答12:

If you are using the official mysql docker container, there is a simple solution:

Add the following line to your docker-compose service:

command: --default-authentication-plugin=mysql_native_password

Example configuration:

mysql:
     image: mysql:8
     networks:
       - net_internal
     volumes:
       - mysql_data:/var/lib/mysql
     environment:
       - MYSQL_ROOT_PASSWORD=root
       - MYSQL_DATABASE=db
     command: --default-authentication-plugin=mysql_native_password

回答13:

As many pointed out in other answers, changing the default authentication plugin of MySQL to native does the trick.

Still, since I can't use the new caching_sha2_password plugin, I'll wait until compatibility is developed to close the topic.

回答14:

I solved this with MySQL 8.0.12 by running:

mysql_upgrade -u root

回答15:

in my case, to fix it I preferred to create a new user to use with PhpMyAdmin because modifying the root user has caused native login problems with other applications such as MySQL WorkBench.

This is what I did:

• Log in to MySQL console with root user: mysql -u root -p, enter your password.
• Let’s create a new user within the MySQL shell:

CREATE USER 'newMySqlUsername'@'localhost' IDENTIFIED WITH mysql_native_password BY 'mysqlNewUsernamePassword';

• At this point the newMysqlUsername has no permissions to do anything with the databases. So is needed to provide the user with access to the information they will need.

GRANT ALL PRIVILEGES ON * . * TO ' newMySqlUsername'@'localhost';

• Once you have finalized the permissions that you want to set up for your new users, always be sure to reload all the privileges.

FLUSH PRIVILEGES;

• Log out by typing quit or \q, and your changes will now be in effect, we can log in into PhpMyAdmin with the new user and it will have access to the databases.

• Also you can log back in with this command in terminal:

mysql -u newMySqlUsername -p

回答16:

I used ALTER USER root@localhost IDENTIFIED WITH mysql_native_password BY 'PASSWORD'; it worked

回答17:

You can change the Authentication if u are running on Windows by reconfiguring the installation by running the msi. It will ask for changing the default authentication to legacy, then u can proceed with that option to change the authentication to the legacy one.

回答18:

Create another user with mysql_native_password option:

In terminal:

mysql> CREATE USER 'su'@'localhost' IDENTIFIED WITH mysql_native_password BY '123';
mysql> GRANT ALL PRIVILEGES ON * . * TO 'su'@'localhost';
mysql> FLUSH PRIVILEGES;

来源：https://stackoverflow.com/questions/49948350/phpmyadmin-on-mysql-8-0